INVENTORIES AND SUPPLIES (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories and supplies consisted of the following (in thousands):

	December 31, 2017		December 31, 2016
Oil and oil related products	$	58,142	$	52,158
Supplies and drums	94,242		90,610
Solvent and solutions	9,167		8,566
Modular camp accommodations	1,826		15,255
Other	12,635		11,839
Total inventories and supplies	$	176,012	$	178,428